90236794 has 4 divisors (see below), whose sum is σ = 135355194. Its totient is φ = 45118396.

The previous prime is 90236791. The next prime is 90236801. The reversal of 90236794 is 49763209.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 78588225 + 11648569 = 8865^2 + 3413^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (90236791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22559197 + ... + 22559200.

Almost surely, 2^90236794 is an apocalyptic number.

90236794 is a deficient number, since it is larger than the sum of its proper divisors (45118400).

90236794 is a wasteful number, since it uses less digits than its factorization.

90236794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45118399.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 90236794 is about 9499.3049219403. The cubic root of 90236794 is about 448.5331563046.

The spelling of 90236794 in words is "ninety million, two hundred thirty-six thousand, seven hundred ninety-four".